One verse

Srimad Bhagavatam 3.11.42

3.11.42

तदाहुरक्षरं ब्रह्म सर्वकारणकारणम् । विष्णोर्धाम परं साक्षात्पुरुषस्य महात्मन: ॥ ४२ ॥

tad ahur aksaram brahma sarva-karana-karanam visnor dhama param saksat purusasya mahatmanah

tat
that
ahuh
is said
aksaram
infallible
brahma
the supreme
sarva-karana
all causes
karanam
the supreme cause
visnoh dhama
the spiritual abode of Visnu
param
the supreme
saksat
without doubt
purusasya
of the purusa incarnation
mahatmanah
of the Maha-Visnu.

The Supreme Personality of Godhead, Sri Krsna, is therefore said to be the original cause of all causes. Thus the spiritual abode of Visnu is eternal without a doubt, and it is also the abode of Maha-Visnu, the origin of all manifestations.